Inventor · disambiguated record
Druce K. Crump
Also filed as: CRUMP DRUCE · CRUMP DRUCE K · CRUMP DRUCE KIRK
46 granted patents·2 pending applications·544 citations·filing 1980–2020
98Inventor score
Files withDOW CHEMICAL CO38ISOTHERAPEUTICS GROUP LLC3EASTMAN KODAK CO2SNIP HOLDINGS INCORPORATED2CRUMP DRUCE K1
Top patents by PatentIndex Score
48 records- 0196US4560548ABone seeking Tc-99m complexes of phosphonate derivatives of bis(aminoalkyl)piperazineDOW CHEMICAL CO·Filed 1984·Granted Dec 24, 1985·44 cites·20 claims
- 0287US5652085ASuccinic acid derivative degradable chelants, uses and composition thereofEASTMAN KODAK CO·Filed 1995·Granted Jul 29, 1997·13 cites·52 claims
- 0387US5481018AAmino nitrile intermediate for the preparation of alanine diacetic acidDOW CHEMICAL CO·Filed 1995·Granted Jan 2, 1996·31 cites·1 claims
- 0487US4872996AUse of aminophosphonic acids to inhibit scale formation and corrosion caused by manganese in water systemsDOW CHEMICAL CO·Filed 1988·Granted Oct 10, 1989·34 cites·12 claims
- 0584US5389594ADegradable chelants having sulfonate groups, uses and compositions thereofDOW CHEMICAL CO·Filed 1993·Granted Feb 14, 1995·17 cites·10 claims
- 0684US4500356AMethylenephosphonic acid derivatives of bis(aminoalkyl)piperazines as cement set retarding agentsDOW CHEMICAL CO·Filed 1984·Granted Feb 19, 1985·15 cites·16 claims
- 0784US4472200ANew additives for retarding setting of cement from methylenephosphonated aminohydrocarbylpiperazine-urea adductsDOW CHEMICAL CO·Filed 1983·Granted Sep 18, 1984·15 cites·16 claims
- 0877US5972868AMethod for controlling alkaline earth and transition metal scaling with 2-hydroxyethyl iminodiacetic acidDOW CHEMICAL CO·Filed 1998·Granted Oct 26, 1999·33 cites·16 claims
- 0976US9687574B2Radioactive compositions and methods for their therapeutic useISOTHERAPEUTICS GROUP LLC·Filed 2012·Granted Jun 27, 2017·2 cites·2 claims
- 1074US4680396ABis(aminoalkyl)piperazine derivatives and their use as metal ion control agentsDOW CHEMICAL CO·Filed 1984·Granted Jul 14, 1987·8 cites·21 claims
- 1173US8034756B2Formulations with unexpected cleaning performance incorporating a biodegradable chelantDOW GLOBAL TECHNOLOGIES LLC·Filed 2007·Granted Oct 11, 2011·3 cites·10 claims
- 1273US5447575ADegradable chelants having sulfonate groups, uses and compositions thereofDOW CHEMICAL CO·Filed 1994·Granted Sep 5, 1995·30 cites·8 claims
- 1370US5258141ADegradable chelants having sulfonate groups, uses and compositions thereofDOW CHEMICAL CO·Filed 1993·Granted Nov 2, 1993·8 cites·15 claims
- 1470US5208369ADegradable chelants having sulfonate groups, uses and compositions thereofDOW CHEMICAL CO·Filed 1991·Granted May 4, 1993·21 cites·19 claims
- 1569US4500469AMetal ion control compounds based on norbornaneDOW CHEMICAL CO·Filed 1984·Granted Feb 19, 1985·7 cites·11 claims
- 1669US4468252ASet retarding additives for cement from aminomethylenephosphonic acid derivativesDOW CHEMICAL CO·Filed 1983·Granted Aug 28, 1984·20 cites·20 claims
- 1767US4466836ASet retarding compounds for use in cement slurriesDOW CHEMICAL CO·Filed 1983·Granted Aug 21, 1984·19 cites·3 claims
- 1866US5733858ASuccinic acid derivative degradable chelants, uses and compositions thererofDOW CHEMICAL CO·Filed 1996·Granted Mar 31, 1998·23 cites·29 claims
- 1963US10918746B2Radioactive compositions and methods for their therapeutic useISOTHERAPEUTICS GROUP LLC·Filed 2020·Granted Feb 16, 2021·0 cites·20 claims
- 2063US5208363APreparation of aminonitrilesDOW CHEMICAL CO·Filed 1992·Granted May 4, 1993·7 cites·28 claims
- 2161US6465690B1Process for the preparation of polyamino succinic acids and derivatives thereofDOW CHEMICAL CO·Filed 2000·Granted Oct 15, 2002·3 cites·21 claims
- 2260US5691120ASuccinic acid derivative degradable chelants, uses and compositions thereofEASTMAN KODAK CO·Filed 1997·Granted Nov 25, 1997·3 cites·54 claims
- 2360US4799995AScale inhibition formulations for kraft digestersDOW CHEMICAL CO·Filed 1987·Granted Jan 24, 1989·22 cites·5 claims
- 2460US4786329AAsphalt compositions containing anti-stripping additives prepared from amines or polyamines and phosphonatesDOW CHEMICAL CO·Filed 1987·Granted Nov 22, 1988·12 cites·13 claims
- 2557US5817613AAmino nitrile intermediate for the preparation of 2-hydroxyethyl iminodiacetic acidDOW CHEMICAL CO·Filed 1997·Granted Oct 6, 1998·13 cites·3 claims
- 2656US5846925ASuccinic acid derivative degradable chelants, uses and compositions thereofDOW CHEMICAL CO·Filed 1997·Granted Dec 8, 1998·12 cites·12 claims
- 2756US5569443AMethod for removing hydrogen sulfide from a gas using polyamino disuccinic acidDOW CHEMICAL CO·Filed 1995·Granted Oct 29, 1996·17 cites·8 claims
- 2855US4895600AAsphalt compositions containing anti-stripping additives prepared from amines or polyamines and phosphonatesDOW CHEMICAL CO·Filed 1988·Granted Jan 23, 1990·10 cites·9 claims
- 2954US10583211B2Radioactive compositions and methods for their therapeutic useISOTHERAPEUTICS GROUP LLC·Filed 2017·Granted Mar 10, 2020·0 cites·11 claims
- 3054US4466835ACement compositions containing set retardersDOW CHEMICAL CO·Filed 1983·Granted Aug 21, 1984·12 cites·14 claims
- 3153US4758635APolyamindoamine based metal ion control compoundDOW CHEMICAL CO·Filed 1984·Granted Jul 19, 1988·15 cites·29 claims
- 3252US4312815APreparation of a zinc chelate having improved stabilityDOW CHEMICAL CO·Filed 1980·Granted Jan 26, 1982·3 cites·18 claims
- 3349US8080508B2Formulations with unexpected cleaning performance incorporating a biodegradable chelantCRUMP DRUCE K·Filed 2011·Granted Dec 20, 2011·0 cites·4 claims
- 3449US5098681AProcess for absorption of sulfur compounds from fluidsDOW CHEMICAL CO·Filed 1990·Granted Mar 24, 1992·14 cites·22 claims
- 3548US5741555ASuccinic acid derivative degradable chelants, uses and compositions thereofDOW CHEMICAL CO·Filed 1996·Granted Apr 21, 1998·14 cites·18 claims
- 3647US4489203APolyumeric alkylene phosphoric acid piperazine derivatives as scale inhibitorsDOW CHEMICAL CO·Filed 1982·Granted Dec 18, 1984·10 cites·3 claims
- 3746US4469663AScale control in flue gas desulfurizationDOW CHEMICAL CO·Filed 1982·Granted Sep 4, 1984·13 cites·8 claims
- 3844US4568469AUse of methylene phosphonic acid compositions derived from aminohydrocarbyl piperazine-urea adducts to inhibit scaleDOW CHEMICAL CO·Filed 1985·Granted Feb 4, 1986·2 cites·20 claims
- 3942US2003216275A1Nª,n -dialkyl aminomethylenephosphonic acids and use thereofFiled 2001·Application pending·0 cites
- 4039US4770791AControl of metal ions using bis(aminoalkyl) piperazine derivativesDOW CHEMICAL CO·Filed 1987·Granted Sep 13, 1988·6 cites·42 claims
- 4138US5726341AAmine nitrile intermediate for the preparation of 2-hydroxyethyl iminodiacetic acidDOW CHEMICAL CO·Filed 1996·Granted Mar 10, 1998·3 cites·2 claims
- 4237US5859273ASuccinic acid derivative degradable chelants, uses and compositions thereofDOW CHEMICAL CO·Filed 1996·Granted Jan 12, 1999·5 cites·7 claims
- 4336US4568468AUse of norbornane derived compounds as threshold agentsDOW CHEMICAL CO·Filed 1985·Granted Feb 4, 1986·1 cites·6 claims
- 4434US4540508AAlkylene phosphonic acid scale inhibitor compositionsDOW CHEMICAL CO·Filed 1982·Granted Sep 10, 1985·4 cites·11 claims
- 4532US5488130AAmino nitrile intermediate for the preparation of 2-hydroxypropyl iminodiacetic acidDOW CHEMICAL CO·Filed 1995·Granted Jan 30, 1996·0 cites·1 claims
- 4632US2021290785A1Method of forming and separating tin(ii) from tin(iv)SNIP HOLDINGS INCORPORATED·Filed 2017·Application pending·0 cites
- 4731US10563288B2High purity SN-117M compositions and methods of preparing sameSNIP HOLDINGS INCORPORATED·Filed 2015·Granted Feb 18, 2020·0 cites·13 claims
- 4830US4518777AMethylene phosphonic acid scale inhibitor compositions derived from aminohydrocarcarbylpiperazine urea adductsDOW CHEMICAL CO·Filed 1983·Granted May 21, 1985·0 cites·19 claims
Join the waitlist — get patent alerts
Get an alert when Druce K. Crump files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →